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K. Raja Reddy

K. Raja Reddy

Research Professor

Agronomy - Environmental Physiology

Mailing Address:
Box 9555
Mississippi State, MS 39762
Mailing Address:
100 Northfarm Building 32
Mississippi State, MS 39762
Research/Extension Assignments:
  • Environmental control of plant growth and development
  • Crop simulation modeling and applications
  • Global Change biology
  • Remote sensing applications in natural resource management

  • Ph.D., Sri Venkateswara University, India
  • M.Sc., Sri Venkateswara University, India
  • B.Sc., Sri Venkateswara University, India


Society Membership:
  • American Society of Agronomy
  • Crop Science Society of America
  • Biological Systems Simulation Working Group
  • Gamma Sigma Delta, MSU Chapter
  • Associations of agricultural Scientists of Indian Origin
  • Crop Science Society of America
  • American Society of Agronomy
  • Biological Systems Simulation Working Group
  • Gamma Sigma Delta, MSU Chapter

Recognitions and Awards:
  • 2011 Outstanding Research Award in Cotton Physiology, Arysta Life Science Corporation


  • Jumaa, S. H., E. D. Redoña, T. Walker, W. Gao, K. R. Reddy. 2019. Developing screening tools for early-season high- and low- temperature stress tolerance in rice. SABRAO Journal of Breeding and Genetics 51:12-36. Download
  • Singh, B., D. R. Chastain, S. Jumaa, C. Wijewardana, E. D. Redoña, W. Gao, K.R. Reddy. 2019. Projected day/night temperatures specifically limits rubisco activity and electron transport in diverse rice cultivars. Environmental and Experimental Botany 159:191-199. Download
  • Atwill, R. L., L. J. Krutz, J. A. Bond, K. R. Reddy, J. Gore, T.W. Walker, D. L. Harrell. 2018. Water management strategies and their effects on rice grain yield and nitrogen use efficiency. Journal of Soil and Water Conservation 73(3):257-264. Download
  • Singh, K., C. Wijawaradana, B. Gajanayake, S. Lokhande, T. Wallace, D. Jones, K. R. Reddy. 2018. Genotypic variability among cotton cultivars for heat and drought tolerance using reproductive and physiological traits. Euphytica 214:57. Download
  • Wijewardana, C., K. R. Reddy, M. W. Shankle, S. Meyers, W. Gao. 2018. Low and high-temperature effects on sweetpotato storage root initiation and early transplant establishment. Scientia Horticulturae 240:38-48. Download
  • Wijewardana, C., K. R. Reddy, N. Bellaloui. 2018. Soybean seed physiology, quality, and chemical composition under soil moisture stress. Food Chemistry 278:92-100. Download
  • Bhupinder, S., K. R. Reddy, E. Redona, T. W. Walker. 2017. Developing a screening tool for osmotic stress tolerance classification of rice cultivars based on in vitro seed germination. Crop Science 57: 387-394. Download
  • Meyers, S. L., M. W. Shankle, J. L. Main, B. Gajanayake, K. R. Reddy. 2017. Sweetpotato storage root initiation. Mississippi State University Extension Service Publication 2809. Download
  • Prasad, P. V. V., V. G. Kakani, K. R. Reddy. 2017. Ozone Depletion. Pages 318-326 in B. Thomas, B. G. Murray, D. J. Murphy (Eds.), Encyclopedia of Applied Plant Sciences. Academic Press, Elsevier. Download
  • Reddy, K. R., D. Brand, C. Wijewardana, W. Gao. 2017. Temperature effects on cotton seedling emergence, growth, and development. Agronomy Journal 109:1379-1387. Download
  • Seal, S., D. J. Peterson, C. Iwata, C. M. Kobia, K. R. Reddy. 2017. Expanding global mindedness through a 4-H international village. Journal of Extension 55(2). Download
  • Seepaul, R., B. Macoon, K. R. Reddy, W. B. Evans. 2017. Harvest timing and N application rate effects on switchgrass yield, nutrient cycling, and partitioning. Journal of Plant Nutrition 40(9):1261-1276. Download
  • Singh, B., K. R. Reddy, E.D. Redoña, T. Walker. 2017. Developing a screening tool for osmotic stress tolerance classification of rice cultivars based on in vitro seed germination. Crop Sci. 57:387-394. Download
  • Singh, B., K.R. Reddy, E.D. Redoña, T. Walker. 2017. Screening of rice cultivars for morpho-physiological responses to early-season soil moisture stress. Rice Science 24:322-335. Download
  • Wijewardana, C., W. B. Henry, K. R. Reddy. 2017. Evaluation of drought tolerant maize germplasm to induced drought stress. Journal of the Mississippi Academy of Sciences 62(3):316-329.
  • Bange, M. P., J. T. Baker, P. J. Bauer, J. J. Broughton, G. A. Constable, Q. Luo, D. M. Oosterhuis, Y. Osanai, P. Payton, D. T. Tissue, K. R. Reddy, B. Singh, (Eds.). 2016. Climate Change and Cotton Production in Modern Farming Systems. International Cotton Advisory Committee Review Articles on Cotton Production Research No. 6. CABI, CSIRO.
  • Gajanayake, B., K. R. Reddy. 2016. Sweetpotato responses to mid- and late-season soil moisture deficits. Crop Science 56(4):1865-1877. Download
  • Mujahid, H., K. Pendarvis, J. S. Reddy, B. R. R. Nallamilli, K. R. Reddy, B. Naduri, Z. Peng. 2016. Comparative proteomic analysis of cotton fiber development and protein extraction method comparison in late stage fibers. Proteomes 4(1), 7. Download
  • Reddy, K. R., H. Patro, S. Lokhande, N. Bellaloui, W. Gao. 2016. Ultraviolet-B radiation alters soybean growth and seed quality. Food and Nutrition Sciences 7(1):63108. Download
  • Sah, S., K. R. Reddy, J. Li. 2016. Abscisic acid and abiotic stress tolerance in crop plants. Frontiers of Plant Science 7:571. Download
  • Seepaul, R., B. Macoon, K. R. Reddy, W. B. Evans. 2016. First harvest timing and nitrogen application rate effects on chemical composition and ethanol yield of switchgrass. Crop, Forage and Turfgrass Management 2(1). Download
  • Seepaul, R., B. Macoon, K. R. Reddy, W. B. Evans. 2016. Nitrogen application rate and genotype effects on switchgrass production and chemical characteristics. American Journal of Plant Science 7(3):533-546. Download
  • Wijewardana, C., M. Hock, W. B. Henry, K. R. Reddy. 2016. Growth and physiological trait variation among corn hybrids for cold tolerance. Canadian Journal of Plant Science 96(4):639-656. Download
  • Wijewardana, C., W. B. Henry, W. Gao, K. R. Reddy. 2016. Interactive effects on CO2, drought, and ultraviolet-B radiation on maize growth and development. Journal of Photochemistry and Photobiology B: Biology 160:198-209. Download
  • Abukari, I. A., M.W. Shankle, K.R. Reddy. 2015. Effect of S-metolachlor and rainfall on sweetpotato (Ipomoea batatus (L.) Lam] growth and development. Scientia Horticulturae 185:98-104. Download
  • Abukari, I. A., M.W. Shankle, K.R. Reddy. 2015. Response of sweetpotato (Ipomoea batatus (L.) Lam] to S-metolachlor and rainfall under three temperature regimes. American Journal of Plant Science 6:702-717. Download
  • Gajanayake, B., K.R. Reddy, and M.W. Shankle. 2015. Qualifying growth and developmental responses of sweetpotato to mid and late season temperature. Agronomy Journal 107:1854-1862. Download
  • Lokhande, S. K., K. R. Reddy. 2015. Reproductive performance and fiber quality responses of cotton to potassium nutrition. American Journal of Plant Sciences 6:911-924. Download
  • Lokhande, S., and K.R. Reddy. 2015. Cotton reproductive and fiber quality responses to nitrogen nutrition. International Journal of Plant Production 9:191-209. Download
  • Mujahid, H., K. Pendarvis, J. S. Reddy, B. R. R. Nallamilli, K. R. Reddy, B. Naduri, Z. Peng. 2015. Comparative proteomic analysis of cotton fiber development and protein Extraction method comparison in late stage fibers. Protemes 4(7): 1-18. Download
  • Nandula, V. K., D. L. Poston, C. H. Koger, K. N. Reddy, K. R. Reddy. 2015. Morpho-physiological characterization of glyphosate-resistant and -susceptible horseweed (Conyza canadensis) biotypes of us Midsouth. American Journal of Plant Sciences 6:47-56. Download
  • Singh, R. P., P. V. V. Prasad, K. R. Reddy. 2015. Climate Change: Implications for Stakeholders in Genetic Resources and Seed Sector. Pages 117-180 in D.L. Sparks, editor, Advances in Agronomy, Volume 129. Elsevier. Download
  • Wijewardana, C., M. Hock, W. B. Henry, K. R. Reddy. 2015. Screening corn hybrids for cold tolerance using morphological traits for early-season seeding. Crop Science 55:851-867. Download
  • Gajanayake, B., Reddy, K.R., Shankle, M.W., and Arancibia, R.A. 2014. Growth, developmental, and physiological responses of two sweetpotato (Ipomoea batatas L. [Lam]) cultivars to early season soil moisture deficit. Scientia Horticulturae, Vol. 168: 218-228. Download
  • Gajanayake, B., Reddy, K.R., Shankle, M.W., Arancibia, R.A., and Villordon, A.O.. 2014. Quantifying Storage Root Initiation, Growth, and Developmental Responses of Sweetpotato to Early Season Temperature. Agronomy Journal, Vol. 106(5): 1795-1804. Download
  • Lokhande, S. and Reddy, K.R. 2014. Quantifying Temperature Effects on Cotton Reproductive Efficiency and Fiber Quality. Agronomy Journal, Vol. 106(4): 1275-1282. Download
  • Lokhande, S. and Reddy, K.R. 2014. Reproductive and Fiber Quality Responses of Upland Cotton to Moisture Deficiency. Agronomy Journal, Vol. 106(3): 1060-1069. Download
  • Meyers, S.L., Arancibia, R.A., Shankle, M.W., Main, J., Gajanayake, B., and Reddy, K.R. 2014. Sweet Potato Storage Root Initiation. Mississippi State University Extension Service, Publication 2809, Mississippi State University. Download
  • Reddy, K.R., R. Seepaul, W. Henry, B. Gajanayake, S. Lokhande, and D. Brand. 2014. Maize (Zea mays L.) Yield and Aflatoxin Accumulation Responses to Exogenous Glycinebetaine Application. International Journal of Plant Production, Vol. 8(2):271-290. Download
  • Seepaul, R., B. Macoon, K.R. Reddy, and W.B. Evans.2014. Harvest Frequency and Nitrogen Effects on Yield, Chemical Characteristics, and Nutrient Removal of Switchgrass. Agronomy Journal, Vol. 106(5):1805-1816. Download
  • Singh, S.K., K.R. Reddy, V.R. Reddy, and W. Gao. 2014. Maize growth and developmental responses to temperature and ultraviolet-B radiation interaction. PhotoSynthetica, Vol. 52(2):262-271. Download
  • Temu, V., B.S. Baldwin, K.R. Reddy, S. Riffell, and L.W. Burger. 2014. Wildlife Habitat Quality (Sward Structure and Ground Cover) Response of Mixed Native Warm-Season Grasses to Harvesting. Environments, Vol. 1(1):75-91. Download
  • Thorp, K.R., S. Ale, M.P. Bange, E.M. Barnes, G. Hoogenboom, R.J. Lascano, A.C. McCarthy, S. Nair, J.O. Paz, N. Rajan, K.R. Reddy, G.W. Wall, J.W. White. 2014. Development and Application of Process-based Simulation Models for Cotton Production: A Review of Past, Present, and Future Directions. Journal of Cotton Science, Vol. 18(1): 10-47. Download
  • Gajanayake, B., K.R. Reddy, M.W. Shankle, and R. Arancibia. 2013. Early-season Soil Moisture Deficit Reduces Sweetpotato Storage Root Initiation and Development. HortScience, Vol. 48:1457-1462. Download
  • Reddy, K.R., W. Henry, R. Seepaul, S. Lokhande, B. Gajanayake, D. Brand. 2013. Exogenous application of glycinebetaine facilitates maize (Zea mays L.) growth under water deficit conditions. American Journal of Experimental Agriculture 3(1):1-13. Download
  • Singh, R.P., and K.R. Reddy. 2013. Impact of Climate Change and Farm Management. Climate Change and Environmental Sustainability, Vol. 1(1):53-72. Download
  • Singh, R.P., P.V. Prasad, and K.R. Reddy. 2013. Impacts of changing climate and climate variability on seed production and seed industry. Advances in Agronomy 118:49-110. Download
  • Singh, R.P., P.V. Prasad, and K.R. Reddy. 2013. Impacts of Changing Climate and Climate Variability on Seed Production and Seed Industry. Advances in Agronomy, Vol. 118:49-110. Download
  • Bandara, G., K.R. Reddy, M.W. Shankle, and A. Arancibia. 2012. Sweetpotato growth and developmental responses to soil moisture deficits during the early-season. HortScience 47 (9):S43.
  • Bryson, C.T., K.N. Reddy, J.D. Byrd. 2012. Growth, development, and morphological differences among native and nonnative prickly nightshades (Solanum spp.) of the Southeastern United States. Invasive Plant Science and Management 5(3):341-352. Download
  • Liang, X.Z., M. Xu, W. Gao, K.R. Reddy, K. Kunkel, D.L. Schmoldt, A.N. Samel. 2012. A distributed cotton growth model developed from GOSSYM and its parameter determination. Agronomy Journal 104(3):661-674. Download
  • Liang, X.Z., M. Xu, W. Gao, K.R. Reddy, K. Kunkel, D.L. Schmoldt, A.N. Samel. 2012. Physical modeling of U.S. cotton yields and climate stresses during 1979-2005. Agronomy Journal, Vol. 104(3):675-683. Download
  • Reddy, V.R., D.H. Fleisher, D.J. Timlin, V. Anbumozhi, K.R. Reddy, Y. Yang. 2012. Monitoring the vulnerability and need for adaptation planning for food security. In pages 36-46, V. Anbumozhi, M. Breiling, S. Pathmarajah, V.R. Reddy, editors; Climate Change in Asia and the Pacific: How Can Countries Adapt? 1st Edition. New Delhi, India: SAGE Publications India Pvt Ltd. Ed.
  • Seepaul, R., B. Macoon, K.R. Reddy. 2012. Ecotypic differences in switchgrass seed germination responses to in vitro osmotic water stress. Seed Technology 34:173-181.
  • Gajanayake, B., B.W. Trader, K.R. Reddy, R.L. Harkess. 2011. Thermotolerance classification of ornamental pepper cultivars using seed germination traits. Seed Technology 33(2):134-146.
  • Gajanayake, K., B.W. Trader, K.R. Reddy, R.L. Harkess. 2011. Screening ornamental pepper cultivars for temperature tolerance using pollen and physiological parameters. HortScience 46 (6):878-884.
  • Krishnan, P., B. Ramakrishnan, K.R. Reddy, and V.R. Reddy. 2011. High temperature effects on rice growth, yield, and grain quality. Advances in Agronomy 111:87-206. Download
  • Seepaul, R., B. Macoon, K.R. Reddy, B.S. Baldwin. 2011. Switchgrass (Panicum virgatum L.) intraspecific variation and thermotolerance classification using in vitro seed germination assay. American Journal of Plant Sciences 2(2):134-147. Download
  • Singh, R.P., P.V. Prasad, A.K. Sharma, K.R. Reddy. 2011. Impacts of high-temperature stress and potential opportunities for breeding. Pages 166-185, Chapter 5, in Crops Adaptation to Climate Change, Blackwell Publishers.
  • Singh, S.K.,K.R. Reddy. 2011. Regulation of photosynthesis, fluorescence, stomatal conductance and water-use efficiency of cowpea (Vigna unguiculata [L.] Walp.) under drought. Journal of Photochenistry and Photobiology B: Biology 105(1):40-50. Download
  • Kakani, V.G., K.R. Reddy. 2010. Reflectance properties, leaf photosynthesis and growth of nitrogen deficient big bluestem (Andropogon gerardii). Journal of Agronomy and Crop Science 196:(5):379-390. Download
  • Landivar, J.A., K.R. Reddy, H.F. Hodges. 2010. Physiological simulation of cotton growth and yield. Pages 318-331 in Physiology of Cotton. New York, NY.
  • Reddy, K.R., P.V. Prasad, S.K. Singh. 2010. Effects of ultraviolet-B radiation and its interactions with climate change factor on agricultural crop growth and yield. Chapter 14, Pages 395-436 in W. Gao, J.r. Slusser, D.L. Schmoldt, editors, UV Radiation in Global Climate Change: Measurements, Modeling and Effects on Ecosystems. Springer and Tsinghua University Press.
  • Reddy, K.R., S.K. Matcha. 2010. Quantifying nitrogen effects on castor bean (Ricinus communis L.) development, growth, and photosynthesis. Industrial Crops and Products 31(1):185-191. Download
  • Reddy, K.R., S.K. Matcha. 2010. Remote sensing algorithms for castor bean nitrogen and pigment assessment for fertility management. Industrial Crops and Products 32(3):411-419. Download
  • Singh, S.K., V.G. Kakani, G. Surabhi, K.R. Reddy. 2010. Cowpea (Vigna unguiculata [L.] Walp.) genotypes response to multiple abiotic stresses. Journal of Photochemistry and Photobiology B: Biology 100(3):135-146. Download
  • Zhao, D., K.R. Reddy, V.G. Kakani, J.J. Read. 2010. Remote-sensing algorithms for estimating nitrogen uptake and nitrogen-use efficiency in cotton. Acta Agriculturae 60(6):500-509. Download
  • Fleisher, D.H., D.J. Timlin, Y. Yang, V.R. Reddy, K.R. Reddy. 2009. Uniformity of soil-plant-atmosphere-research chambers. Transactions of the American Society of Agricultural and Biological Engineers 52(5):1721-1731. Download
  • Surabhi, G., K.R. Reddy, S.K. Singh. 2009. Photosynthesis, fluorescence, shoot biomass and seed weight responses of three cowpea (Vigna unguiculata [L.] Walp.) cultivars with contrasting sensitivity to UV-B radiation. Environmental and Experimental Botany 66(2):160-171. Download
  • Kakani, V.G., K.J. Boote, K.R. Reddy, D.J. Lang. 2008. Response of bahiagrass carbon assimilation and photosystem to below optium temperatures. Functional Plant Biology 35(12):1243-1254. Download
  • Reddy, K.R., V.G. Kakani, H.F. Hodges. 2008. Exploring the use of the environmental productivity index concept for crop production and modeling. Chapter 13, Pages 387-410 in Response of Crops to Limited Water: Understanding and Modeling of Water Stress Effects on Plant Growth Processes. Advances in Agriculture Systems Modeling Series 1, Madison, WI.
  • Singh, S.K., G. Surabhi, W. Gao, K.R. Reddy. 2008. Assessing genotypic variability of cowpea (Vigna unguiculata [L.] Walp.) to current and projected ultraviolet-B radiation. Journal of Photochemistry and Photobiology B: Biology 93(2):71-81. Download
  • Singh, S.K., V.G. Kakani, D. Brand, B.S. Baldwin, K.R. Reddy. 2008. Assessment of cold and heat-tolerance of winter grown canola (Brassica napus L.) cultivars by pollen-based parameters. Journal of Agronomy and Crop Science 194(3):225-236. Download
  • Kakani, V.G., G. Surabhi, K.R. Reddy. 2007. Photosyntesis and fluorescence responses of C4 plant Andropogon gerardii acclimated to temperature and carbon dioxide. Photosynthetica 46(3):420-430. Download
  • Kakani, V.G., K.R. Reddy. 2007. Temperature response of C4 species big bluestem (Andropogon geradii) is modifies by growing carbon dioxide concentration. Environmental and Experimental Botany 61(3):281-290. Download
  • Koti, S., K.R. Reddy, G.W. Lawrence, V.R. Reddy, V.G. Kakani, D. Zhao, W. Gao. 2007. Effect of enhanced UV-B radiation on reniform nematode (Rotylenchulus reniformis Linford and Oliveira) populations in cotton (Gossypium hirsutum L.). Plant Pathology Journal 6(1):51-59. Download
  • Koti, S., K.R. Reddy, V.G. Kakani, D. Zhao, W. Gao. 2007. Effects of carbon dioxide, temperature and ultraviolet-B radiation and their interactions on soybean (Glycine max L.) growth and development. Environmental and Experimental Botany 60(1):1-10. Download
  • Reddy, K.R.,V.G. Kakani. 2007. Screening Capsicum species of different origins for high temperature tolerance by in vitro pollen germination and pollen tube length. Scientia Horticulturae 112(2):130-135. Download
  • Salem, M., V.G. Kakani, S. Koti, K.R. Reddy. 2007. Pollen-based screening of soybean genotypes for high temperatures. Crop Science 47(1):219-231. Download
  • Kakani, V.G., K.R. Reddy, D. Zhao. 2006. Deriving a simple spectral reflectance ratio to determne cotton leaf water potential. Journal of New Seeds 8(3):11-27. Download
  • Mostovoy, G.V., R.L. King, K.R. Reddy, V.G. Kakani, M.F. Filippova. 2006. Statistical estimation of daily maximum and minimum air temperatures from MODIS LST data over the state of Mississippi. GIScience and Remote Sensing 43(1):78-110. Download
  • Read, J.J., K.R. Reddy, J.N. Jenkins. 2006. Yield and fiber quality of cotton as Influenced by nitrogen and potassium nutrition. European Journal of Agronomy 24(3):282-290. Download
  • Reddy, K.R., H.F. Hodges. 2006. Exploring the limitations for cotton growth and yield. Journal of New Seeds 8(2):1-22. Download
  • Kakani, V.G., K.R. Reddy, S. Koti, T.P. Wallace, P.V. Prasad, V.R. Reddy, D. Zhao. 2005. Differences in in vitro pollen germination and pollen tube growth of cotton cultivars in response to high temperature. Annals of Botany 96(1):59-67. Download
  • Koti, S., K.R. Reddy, V.R. Reddy, V.G. Kakani, D. Zhao. 2005. Interactive effects of carbon dioxide, temperature, and ultraviolet-B radiation on soybean (Glaycine max L.) flower and pollen morphology, pollen production, germination and tube lengths. Journal of Experimental Botany 56(412):725-736. Download
  • Reddy, K.R., D. Zhao. 2005. Interactive effects of elevated CO2 and potassium deficiency on photosynthesis, growth, and biomass partitioning of cotton. Field Crops Research 94(2-3):201-213. Download
  • Reddy, K.R., P.V. Prasad, V.G. Kakani. 2005. Crop responses to elevated carbon dioxide and interactions with temperature. Pages 157-191 in Z. Tuba, editor, Ecological Responses and Adaptations of Crops to Rising Atmospheric Carbon Dioxide. Food Products Press, Binghamton, NY.
  • Zhao, D., K.R. Reddy, P. Starks, 2005. Assessment of N status of cotton and forage plant using remote sensing. Pages 1104-1105 in C.J. Li, et al., editors, Plant nutrition for food security, human health and environmental protection, Tsinghua University Press, Beijing, China.
  • Zhao, D., K.R. Reddy, V.G. Kakani, J.J. Read, S. Koti. 2005. Selection of optimum reflectance ratio for estimating leaf nitrogen and chlorophyll concentrations of field-grown cotton. Agronomy Journal 97(1):89-98. Download
  • Zhao, D., K.R. Reddy, V.G. Kakani, S. Koti, W. Gao. 2005. Physiological causes of cotton fruit abscission under conditions of high temperature and enhanced ultraviolet-B radiation. Physiologia Plantarum 124(2):189-199. Download
  • Zhao, D., K.R. Reddy, V.G. Kakani, V.R. Reddy. 2005. Nitrogen deficiency effects on plant growth, leaf photosynthesis, and hyperspectral reflectance properties of sorghum. European Journal of Agronomy 22(4):391-403. Download